1 files changed, 25 insertions, 0 deletions
diff --git a/layout/reftests/webcomponents/fallback-content-1.html b/layout/reftests/webcomponents/fallback-content-1.html
new file mode 100644
index 0000000000..0bcd2abbd3
--- /dev/null
+++ b/layout/reftests/webcomponents/fallback-content-1.html
@@ -0,0 +1,25 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <script>
+    function tweak() {
+      // div with style "border: 10px solid green"
+      var shadowDiv = document.createElement("div");
+      shadowDiv.style.border = "10px solid green";
+
+      // Insertion point will match nothing and use fallback content.
+      var slot = document.createElement("slot");
+      shadowDiv.appendChild(slot);
+
+      // Append three nodes as children to use as fallback content.
+      slot.innerHTML = '<span style="background-color: orange">Hello</span> <span style="background-color: green">World</span>';
+
+      var shadowRoot = document.getElementById('outer').attachShadow({mode: 'open'});
+      shadowRoot.appendChild(shadowDiv);
+    }
+  </script>
+</head>
+<body onload="tweak()">
+<div id="outer"></div>
+</body>
+</html>